1 files changed, 87 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/RelativeTimeFormat/prototype/format/en-us-numeric-auto.js b/js/src/tests/test262/intl402/RelativeTimeFormat/prototype/format/en-us-numeric-auto.js
new file mode 100644
index 0000000000..ef84a32934
--- /dev/null
+++ b/js/src/tests/test262/intl402/RelativeTimeFormat/prototype/format/en-us-numeric-auto.js
@@ -0,0 +1,87 @@
+// Copyright 2018 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.RelativeTimeFormat.prototype.format
+description: Checks the behavior of Intl.RelativeTimeFormat.prototype.format() in English.
+features: [Intl.RelativeTimeFormat]
+locale: [en-US]
+---*/
+
+const units = [
+  "second",
+  "minute",
+  "hour",
+  "day",
+  "week",
+  "month",
+  "quarter",
+  "year",
+];
+
+const rtf = new Intl.RelativeTimeFormat("en-US", { "numeric": "auto" });
+
+assert.sameValue(typeof rtf.format, "function", "format should be supported");
+
+// https://www.unicode.org/cldr/charts/33/summary/en.html#1530
+const exceptions = {
+  "year": {
+    "-1": "last year",
+    "0": "this year",
+    "1": "next year",
+  },
+  "quarter": {
+    "-1": "last quarter",
+    "0": "this quarter",
+    "1": "next quarter",
+  },
+  "month": {
+    "-1": "last month",
+    "0": "this month",
+    "1": "next month",
+  },
+  "week": {
+    "-1": "last week",
+    "0": "this week",
+    "1": "next week",
+  },
+  "day": {
+    "-1": "yesterday",
+    "0": "today",
+    "1": "tomorrow",
+  },
+  "hour": {
+    "-1": "1 hour ago",
+    '0': 'this hour',
+    "1": "in 1 hour",
+  },
+  "minute": {
+    "-1": "1 minute ago",
+    '0': 'this minute',
+    "1": "in 1 minute",
+  },
+  "second": {
+    "-1": "1 second ago",
+    "0": "now",
+    "1": "in 1 second",
+  },
+};
+
+for (const unit of units) {
+  const expected = unit in exceptions
+    ? [exceptions[unit]["1"], exceptions[unit]["0"], exceptions[unit]["0"], exceptions[unit]["-1"]]
+    : [`in 1 ${unit}`, `in 0 ${unit}s`, `0 ${unit}s ago`, `1 ${unit} ago`];
+
+  assert.sameValue(rtf.format(1000, unit), `in 1,000 ${unit}s`);
+  assert.sameValue(rtf.format(10, unit), `in 10 ${unit}s`);
+  assert.sameValue(rtf.format(2, unit), `in 2 ${unit}s`);
+  assert.sameValue(rtf.format(1, unit), expected[0]);
+  assert.sameValue(rtf.format(0, unit), expected[1]);
+  assert.sameValue(rtf.format(-0, unit), expected[2]);
+  assert.sameValue(rtf.format(-1, unit), expected[3]);
+  assert.sameValue(rtf.format(-2, unit), `2 ${unit}s ago`);
+  assert.sameValue(rtf.format(-10, unit), `10 ${unit}s ago`);
+  assert.sameValue(rtf.format(-1000, unit), `1,000 ${unit}s ago`);
+}
+
+reportCompare(0, 0);